Real estate properties can have lockboxes that contain keys for gaining property access. The lockboxes can record information about each real estate agent who showed a property and can wirelessly transmit that information for storage in a database. The information can include the agent' s identity, an identifier of the lockbox or property, and an access time, for example. The agent can carry a personal emergency response system (PERS) device so that the agent can send out a wireless emergency alert if the agent feels threatened or otherwise experiences an emergency situation. Upon receipt of such a wireless emergency alert, a remote system can access the database to determine one or more properties that the agent has visited. Thus, the system can track the agent and determine a location of the emergency situation.